package com.chixing.day06_static.Homework;

public class Test  {
    public static void main(String[] args){
        Pet p1 =  new Dog();
        System.out.println(p1 instanceof Dog);
        System.out.println(p1 instanceof Pet);
        p1.run();

        Dog d1 = (Dog)p1;
        System.out.println(d1 instanceof Dog);
        System.out.println(d1 instanceof Pet);
        d1.run();

        Pet p2 =  new Pet();
        Dog d2 = (Dog)p2;
        System.out.println(d2 instanceof Dog);
        System.out.println(d2 instanceof Pet);
    }
}
